2550961689 has 4 divisors (see below), whose sum is σ = 3401282256. Its totient is φ = 1700641124.

The previous prime is 2550961669. The next prime is 2550961727. The reversal of 2550961689 is 9861690552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2550961689 - 2⁸ = 2550961433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2550961669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425160279 + ... + 425160284.

It is an arithmetic number, because the mean of its divisors is an integer number (850320564).

Almost surely, 2^2550961689 is an apocalyptic number.

It is an amenable number.

2550961689 is a deficient number, since it is larger than the sum of its proper divisors (850320567).

2550961689 is an equidigital number, since it uses as much as digits as its factorization.

2550961689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850320566.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The square root of 2550961689 is about 50507.0459342061. The cubic root of 2550961689 is about 1366.3689324518.

The spelling of 2550961689 in words is "two billion, five hundred fifty million, nine hundred sixty-one thousand, six hundred eighty-nine".